Pile-cutter



A. CLAPPEBTON. v

PILE CUTTER. APPLICATION FILED MAY 27. I920.

Patented 11111621, 1921.

2 SH EETS-SHEET 1 CLAPPER TON. I P ILE CUTTER; APPLICATION FILED-MAY 21,1920.

2 SHEETS-SHEET 2.

hvwboz v Patented June 21,

v I UNITED STATES- 'PTATENT QFFICE.

Application filed May 27, 1920. SeriaI'No. 384,538.

To all whom it may cn0em,'

Be it known that I, ALEXANDER UCLAPPER- TON, a citizen of the UnitedStates, and

resident of Yonkers, in the county of Westchester and State of New York,have invented certain new and useful Improvements in Pile-Gutters, ofwhichthefollowing is a specification.

This invention relates to a pile cutting mechanism for looms, wherein acutting tool traveling along'a wire woven in the fabric, severs threadsto form the pile of the fabric. This invention relates to the class ofpile cutters wherein the knife is separate from the Wine, asdistinguished from those in which the wire carries a knife at one end,or wherein a knife travels in a channeled wire. In the latter, aU-shaped wire is usually employed, with aivertically disposed knifetraveling in the groove, whi'chis objectionable owing to the specialform. of

wire reguired, thefrequency of sharpening require trol. A Y

i This invention, has for its object to pro vide a pile cuttingmechanism operating in connection withroundor oval wires with thecutting edge at an angle to the wire and moving in a horizontal plane,and actu ated to be in cutting 'pos'ition during movement in onedirection and out offcutting position during reverse movement. 3Durbreakage, and complexity of coning the latter movement, the knifecanbe easily sharpened, so that delays for replac ing'knives areavoided.

' With theseobjects n view,the invention comprises various features ofconstruction, as hereinafter described in theifollowing specification,and pointed 'out in the claims,

reference being made to the appended drawings, in which- Figure 1 is afront elevation of a loom, showing the invention assembled thereon.

Fig. 2 is a fragmentary view on line 2 2, Fig. 1, the wire and fabrictufts being enlarged for the purpose of illustration,

Fig. 3 is an enlarged side elevation of the cutting mechanism finishingits cutting stroke and being automatically shifted for the sharpeningoperation and return stroke.

Fig. 41 is a plan view of the cutting tool and its shifting mechanism,and

Fig. 5 is an enlarged view of the' cutting mechanism on line 5--5, Fig.3.

Referring to the drawings, 1 indicates the main frame of a loom having atake up roll Patented June my invention. For this purpose, I provide;

a knife 6, which resembles an ordinary pawl, with ahorizontalcuttingedge 7 parallel to the surface of. the fabric and extendingdlagonally of the wireto have aslittingaction. The knife is pivoted at8,! for example, upon av cap screw 9 having a, shouldered fit at 10where secured to the cr0ss head-11, which latter is slidable on theguide bar 11*. A coil spring, 12 is fastened to the, knife 6 at13iand inthe screw 9 at the other end 14, for n'ormally holding. the knife 6elevated, asshown in dotted lines, Fig. 3. A pin 15 on the' knife limitsthe upward throw by 21 of the crosshead 11- "The reciprocating movementof the slide plate. is. effected through the connecting rod'122,operated from a fulcrumed lever 23 pivoted at 24 to.

the'wire' carriage 25 slidable on the guide behind the one beingcut,sojthat the knife will not dropif'one wire is missing. The

knife can beheldclear 'ofiits operative position, by pulling it out inslot 18.,of slide plate 19 to'clear 16, but notclearing pin 30, betweenw clear from cutting, until it is again desired to resume the cuttingoperation. A pin 31 further regulates the cutting level of the edge 7,and may be arranged to be adjustable, so as to prevent the knifedropping too low when there is no wire present under the knife.

In operation as thus far described, the fabric is fed forward step bystep, and synchronized therewith is the reciprocation of the knife.- Theraising and lowering of the knife during the return and cutting strokesrespectively is accomplished as follows: Consider the knife to benearing the end of its cutting stroke. It will be traveling toward theright, in Figs. 1 and 3, by reason ich latter; and the pin 16 the pin,15 is held by the torsion spr ng, 12. 'In this position, the knife 6 isheld bar 25; A foot'28ig mounted on the (knife 6, to "slide on a"woven'in wire. one or more.

pin 17, hearing on the left hand edge of.

of the motion communicated through pin 21 and slot 20 to cross head 11.The pressurev between pin 17 and slot 18wil1 also assist somewhat inurging the knife forward in its travel. The primary purpose, however, of

slot 18, is to hold the knife in cutting position, against the stop pin31, which limits the downward movement of the knife. Now as the rod 22and Slide 19 reach the end of their travel, and begin their returnstroke, no motion to the left can be'communioated through the pin21 tothe cross head 11 until the right hand end of slot 20 comes into bearingwith the pin. Meanwhile the right hand edge of slot 18 is moving the pin17 to the left,'thus rotating the knife upward until the pin 17 strikesagainstthe right hand side of stop pin 31. The right 'hand end of slot20 will now. come into engagementwith pin 21, and will move cross head11 and knife to the left. The lowering of the knife at the beginning ofthe cutting stroke is accomplished in reverse manner.

The sharpening mechanism comprises a stationary stone 36 'held in anadjustable holder'x37 by clalnp 38 above the; knife 6, which, when thelatter is resilientlylifted as described in the foregoing paragraph,will be drawn over the stone 36 during'the initial portion of its returnstroke. The

upper position of the knife is determined by the engagementofpin 17 withpin 31; and

the grinding action of stone upon the knife to] maintain the bevel at isthus controlled the proper angle. a j a I, u p u The wires 1 are,preferably tapered to a round t'opedge as shown, butcan be round,

oval or' U-shaped, andfeach wire has the usual eye or hook at the end(according to the wire inserting andp'ulling means used in the loom) forinserting and pullingout'.

An advantage of this cutting mechanism is that the 'wirefcan be pulledout on the same stroke with the cutting, as willbe seen from ariousmodifications and changes be made in the details of construction withoutdeparting from the scope of the appended claims.,,, v Y

What I claim is:

1. A pile cutter comprising a reciprocatory cross head, a knife pivotedthereon, and an actuating connection between the cross head and knifeforthrowing the knife into and out of cutting position before eachreciprocation.

2. A pile cutter comprising a dress carrying a knife pivoted to movevertically.

to and from operative positionja slide on the cros'shead having alimited relative movement, and a connection from the slide for swingingthe knife to and from op'era-.

tive position. u i v 3. A pile cutter comprisinga reciprocatory crosshead, a knife pivoted thereon'to swing to andfrom cutting positionfaslide on the cross head having limited movement,

actuating means connected to the slide, and a connection betweentheslide and knife for controllingthe position of the knife.

4. Apile cutter comprising a reciproca-r tory cross head,ja knifepivoted thereoma' sharpening means for said knife, and an actuatingconnection between the crosshead and the knife for throwing the knifeinto and out of cutting position before each re ciprocation, and forholding the knife in" operative engagement with said sharpening means. i5. In combination with a plurality of pile wires, apilecuttercomprisin'g a cross head adapted to reciprocate in; thedirection or said wires and-carrying a knife PiV l o move to and fromoperative 'position', said knife being in operative positionwhen thecross ihead moves in one direction and out ofoperative position when thecross head moves the other direction, and a foot carried by the knifeandftrav'elingon a wire; lateral of the pile beingcut, to prevent the iknife from falling below operative position. Signed at New,,York,,in thecounty of May, A. D. 1920.

